where \(\Gamma (a)\)  is the Gamma function [1]}.
Figure 3 shows the shape functions for numerous different values of \(\alpha \) . Note, that all positive \(\alpha \) s mean solution with asymptotic
decay which means that for \(\eta \rightarrow \infty \)  the \(f(\eta ) \rightarrow 0\) .
This can interpreted as certain kind of boundary conditions \(f(0) = 0\)  and \(f(\eta \rightarrow \infty ) \rightarrow 0 \) .
The \( \alpha > 0\)  means additional oscillations.
Zero alpha value means a solution which converges to a finite value,
and negative values means divergent solutions.
